Broadband Details

1. BROADBAND ISDN
AND ATM
Presented By
M.LAVANYA
M Sc (CS&IT)

2. INTRODUCTION
• BISDN is an extension of ISDN in term of capabilities, i.e. it not only has the
narrowband capability of ISDN but also the broadband capability.
• ISDN, which means Integrated Service Digital Network.
• It is a set of CCITT/ITU standards for digital transmission over ordinary telephone
copper wire as well as over other media.
• ISDN is the integration of both analogue or voice data , together with digital data
over the same network.

3. ARCHITECTURE

4. B – ISDN SERVICES
• Interactive Services
 Conversational Services
 Messaging Services
 Retrieval Services
• Distributive Services
 No User Control of Presentation
 User Control of Presentation

5. • ISDN is an underlying technology, which privies cost-effective networking through
the public telephone networks.
• ISDN is an important step forward in the adaptation of the network to handle the
increasing global demand for computer-to computer data communications.
• ISDN brings us closer to the goal of a ubiquitous multi-service network, integrating
voice, data, voice and image.

6. BROADBAND (FDM , true simultaneous)

7. BROADBAND CONNECTION
• much greater bandwidth than modems.
• DSL uses standard phone lines and is provided y phone companies in many areas.
• Cable Modems provide fast network connections through cable television
networks in many areas.
• High-Speed Wireless connections can connect computers to networks sing radio
waves rather than wires.
• Satellite Dishes can deliver fast computer network connections as well as television
programs.

9. CABLE BROADBAND : ADVANTAGES & DISADVANTAGES.
• ADVANTAGES:
High speed connection.
Always on.
Easy installation.
• DISADVANTAGES:
Not available to all TV networks.
This can cause congestion which slows down /upload speeds.
Requires TV connection.

10. ASYNCHRONOUS TRANSFR MODE(ATM)
• Asynchronous Transfer Mode, a network technology based on transferring data in
cells or packets of a fixed size.
• Asynchronous transfer mode is the cell relay protocol designed by the ATM Forum
and adopted by the ITU-T.
• The cell used with ATM is relatively small compared to units used with older
technologies.
• ATM was developed to meet the need of the “Broadband Integrated service
digital network” and designed to telecommunication and computer network.
• The small, constant cell size allows ATM equipment to transmit video, audio, and
computer data over the same network.

11. ASYNCHRONOUS TRANSFER MODE(ATM)

12. ATM USES TWO TYPES OF CONNECTION
• ATM provides permanent virtual connections and switched virtual connections.
• Permanent virtual connections(PVC)
permanent connections set up manually by network manager.
• Switched virtual connections(SVC)
Setup and released on demand by the end user via signaling procedures.

13. ATM SOLUTION – ATM NETWORK
• Uses ATM switch in star.
• Communication via switch.
• Network is highly scalable.
• Extremely high data rates – 1.544Mbps to 155Mpbs.
• 2 OFC between host and switch for full duplex line.
• Developed as part of broadband ISDN.
• Used in private non – ISDN networks.
• Also called Cell Relay.
• Higher and Lower speeds are possible.

14. ATM PROTOCOL STACK